Time-Serts are made by Helicoil.  Time-Serts are inserted using Red Locktight so no leakage will occur between the threads of the Time-Sert and the engine case.  If the case has a crack nearby that is another problem.

Frank

> On Apr 14, 2018, at 11:00 PM, Automatic digest processor <LISTSERV@GERRY.VANAGON.COM> wrote:
> 
> them before.  But, I do see a problem.
> 
> As you pointed out, the Time-Sert has a shoulder that extends beyond
> the original sealing surface.  I agree the that the seal will then be
> between the drain plug and the Time-Sert if an OEM copper crush gasket
> is used.  However, what prevents oil from leaking though the junction
> of the threads on the outside of the Time-Sert and the engine case?  Is
> the Time-SertAnd threaded in with some sort of sealant?  And, if the
> leak is from a crack in the original steel insert and the adjoining
> case (11 o'clock on the photos), sealing with a Helicoil replacement
> will do nothing.  Please keep in mind that the Helicoil, OEM drain plug,
> and cardboard gasket worked fine for 20 years.